Resolving dependencies... Configuring old-locale-1.0.0.7... Building old-locale-1.0.0.7... Installed old-locale-1.0.0.7 Configuring hscrtmpl-1.2... Building hscrtmpl-1.2... Failed to install hscrtmpl-1.2 Build log ( /home/builder/.cabal/logs/hscrtmpl-1.2.log ): cabal: Entering directory '/tmp/cabal-tmp-1218/hscrtmpl-1.2' Configuring hscrtmpl-1.2... Building hscrtmpl-1.2... Preprocessing executable 'hscrtmpl' for hscrtmpl-1.2... [1 of 1] Compiling Main ( hscrtmpl.hs, dist/build/hscrtmpl/hscrtmpl-tmp/Main.o ) hscrtmpl.hs:63:29: error: Ambiguous occurrence ‘defaultTimeLocale’ It could refer to either ‘Data.Time.defaultTimeLocale’, imported from ‘Data.Time’ at hscrtmpl.hs:28:1-16 (and originally defined in ‘time-1.6.0.1:Data.Time.Format.Locale’) or ‘System.Locale.defaultTimeLocale’, imported from ‘System.Locale’ at hscrtmpl.hs:33:1-20 cabal: Leaving directory '/tmp/cabal-tmp-1218/hscrtmpl-1.2' cabal: Error: some packages failed to install: hscrtmpl-1.2 failed during the building phase. The exception was: ExitFailure 1